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Daniel Bernoulli, an 18th century Dutch born mathematician, discovered
that fluids accelerated creating a low pressure zone when forced past
an obstruction. He formulated this in his work Hydrodynamica which considered
the basic properties of fluid flow, pressure, density and velocity,
and gave their fundamental relationship. It is now known as Bernoulli´s
principle. His theory goes a long way to explaining why airplanes can
fly.
This has been one of the most popular exhibits in the history of science centres, and it shows how the interaction of the low pressure zones on all sides of the ball cause it to remain trapped in the airstream.
The children´s exhibition Stern
für Kids for Mercedes Benz at the 1995 Frankfurt motor show
provided a chance to "build a better Bernoulli": This time
designed to travel, and to be produced in multiple copies.
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